{
  "manageEntity": {
    "action": "Save",
    "entityId": "741842588",
    "entityType": "Track",
    "nonce": "0x6fd719326d64503f10653f575b963162cb4e621f8e41ba94ac5e4b2a47110401",
    "signature": "0x62aeb6dc314eefb7aa8fa2ef146c6d6e3ed78644d79af2be37cfe671ca0799050f564070efa292c0b97331eb7cbb23c7fa0d08ffcb681a6c34cd7ef999f0663f1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}